Similar experience here, perhaps. Wife and I run and our training involves running in the morning before work. I've done a couple runs, up to ten miles, before breakfast and not eaten afterwards until lunch (typically 1100-1200.) I was surprised that following the runs, I was not starving. It really was no effort to not eat. On the ten mile runs, I put a sports drink in my water bottle which includes carbs as well as electrolytes, so I suppose that's not really fasting. Pre and post run I do drink water and black coffee.

And then there are mornings like today where I ran 10 miles and then had 2 eggs, 2 strips of extra thick bacon, two buckwheat pancakes (with butter and syrup)and a piece of rye toast with marmalade. Definitely not fasting!